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BILD3
Lecture 4
| Term | Definition |
|---|---|
| Genotype | genetic composition of an organism (single gene or whole genome) |
| Phenotype | the characteristic appearance or function of an organism resulting from genotype and/or environment |
| Discrete Trait | a phenotype that manifests as clear and separable differences in a population. |
| Continuous Trait | a phenotype that manifests as a continuum along a spectrum |
| Obligate Trait | a phenotype that is 100% dependent on the genotype of the individual, not the environment |
| Facultative Trait | the phenotype correlates strongly with the environment |
| Reaction Norm | the range of phenotypes that appear for a single genotype under different environmental conditions |
| Phenotypic Plasticity | the ability of an organism to change its phenotype because of environmental conditions |
| Polyphenism | the phenomenon where two or more distinct phenotypes are produced by the same genotype |
| Mutation | Change in genetic material of an organism; he only source of NEW genetic variation; Change has to be heritable to alter the population (in the sperm and eggs) |
| Recombination | “reshuffles the deck,” creates new genetic combinations |
| Population variation | any difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences |
| Heritability | proportion of phenotypic variation that is genetic |
| Adaptation | process by which an animal or plant species becomes fitted to its environment; it is the result of natural selection's acting upon heritable variation |
Created by:
stacymdez